[comp.windows.x] Real-time Screen "Copying"

rohde@daimi.dk (Thomas Rohde) (10/31/90)

	At Aarhus University, Denmark, we sometimes need to demonstrate
	a program for many people at the same time. We would like to
	be able to replicate the visual appearance of one master Sun on
	several other Sun's in real-time. A teacher can then demonstrate
	a X program for several students, which all has a fair chance
	of seeing what's going on.

	Are there anyone who has any good ideas as how this can be done,
	or already implemented it.

		Thanks,
	
	        Thomas Rohde
		Aarhus Uni., Denmark	

bernward@xcc.uucp (Bernward Averwald) (10/31/90)

In article <1990Oct30.172021.1925@daimi.aau.dk> rohde@daimi.dk (Thomas Rohde) writes:
...
>	Are there anyone who has any good ideas as how this can be done,
>	or already implemented it.

Look for xwatchwin from comp.sources.x. 
It was posted around april '89.

Bernward

etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor) (10/31/90)

There is not a "good" fast way.  One way is to have a process continuosly "snap" a picture (via XGetImage) and send it to other terminals (via XPutImage).  We have used this method to spy on novices when using X software for the first time.
-- 
					Eric Taylor
					Baylor College of Medicine
					etaylor@wilkins.bmc.tmc.edu
					(713) 798-3776
--
					Eric Taylor
					Baylor College of Medicine
					etaylor@wilkins.bmc.tmc.edu
					(713) 798-3776